Labor launches election campaign with TV ad

The South Australian Labor Party has kicked off its re-election campaign with the launch of television advertisements featuring the slogan 'Jay 4 SA'.

The March 15 poll is now under seven weeks away and the ad features Premier Jay Weatherill spruiking major projects, such as the Adelaide Oval redevelopment and the new Royal Adelaide Hospital.

He also pledges to modernise manufacturing, support workers affected by the Holden closure and stand-up to the Prime Minister Tony Abbott if he damages the state's interests.

The promo premiered at the final stage of the Tour Down Under and hit television screens last night.

Mr Weatherill conceded there are challenges ahead.

"I accept that there is a massive policy choice which is different between Labor and Liberal," he said.

"We want to grow the economy. They think by cutting, somehow that's going to lead to the markets springing to life and solving the economic challenges that we face."

Opposition Leader Steven Marshall says the launch of the campaign was designed to draw attention away from the economic hit announced earlier this week, and questioned the ad's attack on the Federal Government.

"A very poor strategy to argue with Canberra. We've got a plan to grow our economy. We want to back business to grow jobs here in South Australia. Under Labor you're going to have high taxes and fewer jobs," he said.